Adjustable eraser attachment for pencils



Sept. 8, 1931. M; A. WEST ADJUSTABLE ERASER ATTACHMENT FOR PENCILS FiledAug. 22, 1950 INVENTOR flaariuellfl. was? ATTOR N EYS Patented Sept 8,1931 PAT OFFICE MAXWELL A. WEST, OF PORTLAND, OREGON ADJUSTABLE ERASERATTACHMENT .FOR PENCILS' Application filed August 22, 1930. Serial No.477,174.

This invention relates to an eraser attachment for pencils. 7

The invention has for its general object the provision of an attachmentof the indicated cahracter which will be extremely simple ofconstruction, inexpensive of manufacture, and readily applicable to anypencil. Among the benefits and advantages of the attachment may beenumerated the following: By a slight turn of the eraser sleeve or thepencil relative to the sleeve, the pencil will force the eraser out ofthe sleeve as may be desired; the eraser will always be snug in itssleeve, and by reason of its novel construction cannot become stuck onaccount of distentlon or expanslon of the eraser; the eraser may bealmost if not entirely used thereby eliminating waste; a new eraser maybe readily put into use whenever the occasion arises; the eraser willnot deteriorate since it will not be exposed to the air; and theattachment may bereadily removed so that when a pencil becomes short orstubby the same may still be used with an extension at tachment.

The nature of the invention and its distinguishing features andadvantages will appear when the following specification is read inconnection with the accompanying drawings, in which Figure 1 is a sideview of an attachment constructed in accordance with the presentinvention shown applied to a pencil, a portion of the latter beingshown;

Figure 2 is a central longitudinal section through the attachment and aportion of the pencil;

Figure 3 is a perspective view of the eraser.

Referring now more particularly to the several'views of the drawings itwill be apparent that the attachment of the present invention, generallystated, comprises a tubular member or sleeve 10 and an eraser 11. Thetubular member or sleeve 10 is open at each end, and is adapted toreceive therein the eraser 11, and one end is adapted to receive one endof the pencil 12. The attachment is adapted to be used advantageouslywith 60 a pencil noncircular in cross section although the same may beused with a pencil round in cross section.

More specifically stated, the attachment components consist of thefollowing distinguishing features. The sleeve 10 is made preferably ofmetal and the same is provided with threads 13 at or near the endthereof which receives the end of the pencil. It will therefore beunderstood that the sleeve 10 is adapted for threading engagement withthe pencil 12, and will therefore be movable axially or longitudinallythereof. The remainder of the sleeve 10 above the threads will be ofuniform diameter but, if desired, may be provided with flats 14 toprevent the penoil from rolling. The sleeve 10 may also be milled as at15 to rovide a gripping surface.

The eraser 11 consists of a body which is preferably round in crosssection and which is made of erasive material, preferably a highgrade'rubber. The eraser 1 has a section 16 of relatively increased sizeor diameter, and is preferably located at one end, as shown most clearlyin Figure 3. The eraser 11 may be readilyinserted into the sleeve 10 bya simple twist of the eraser and inward push thereon. The enlarged endsection 16 is of a size to snugly fit within the sleeve 10 and contacttherewith, and'the remaining portion of the eraser, which is of lessdiameter than the internal diameter of the sleeve 10, will be veryslightly spaced from or be just out of contact with the adjacent sectionof the sleeve 10. The enlarged section 16 of the eraser will abut theend of the pencil projecting into the threaded end of the sleeve 10, asshown most clearly in Figure 2.

From the foregoing it will be apparent that a slight turn of the sleeverelatively to the pencil or a slight turn of the pencil relatively tothe sleeve will cause the pencil to exert endwise pressure on theenlarged section 16 with the result that the eraser will be forcedaxially of the sleeve 10 to present the desired projecting end for theobvious purpose. In doing this the eraser 11 will not be distended orcannot expand at the center or intermediate portion thereof due to theprovision of the enlarged section 16. It will therefore be apparent thatthe eraser 11 may be adjusted at will and will always present an endportion which will be firm yet capable of being used for making thenecessary erasures. It will also be apparent that the other benefits andadvantages hereinabove set forth may be had.

What is claimed is:

1; An eraser attachment for pencils com- I prising the combination of anopen-ended tubular member adapted to receive in one end thereof one endof a pencil, and an eraser having a relatively enlarged section, saideraser being receivable in the opposite end of the tubular member withsaid enlarged section in contact with the tubular member, whereby theeraser may be moved to a projecting position in relation to the tubularmember, upon the relative adjustment of the tubular member and thepencil, said enlarged section of the eraser in engagement with thetubular member serving to retain the eraser in the projecting position.

2. An eraser attachment for pencils comprising the combination of anopen ended tubular member having a threaded end section adapted toreceive therein one end of a pencil, whereby the tubular member andpencil may be moved longitudinally in relation to each other, and aneraser having a relatively enlarged section, said eraser beingreceivable in the opposite end of the tubular member with said enlargedsection in contact with the tubular member, whereby the eraser may bemoved to a projecting position in relation to the tubular member, uponthe relative adjustment of the tubular member and the pencil, saidenlarged section of the eraser in engagement with the tubular memberserving to retain the eraser in the projecting position.

3. In an eraser attachment for pencils, a tubular member, and an eraserhaving an enlarged section, said tubular member being adapted to receivethe eraser therein with the enlarged section in contact with the tubularmember, whereby the eraser may be moved endwise to a projecting positionin relation of the tubular member by exerting pressure on one end of theeraser, and said enlarged section of the eraser in engagement with thetubular member, serving to retain the eraser in the projecting position,

MAXWELL A. WEST.

